Evaluation of chemical immobilization treatments for reducing arsenic transport in red mud
文献类型：期刊论文
| 作者 | Li, Yiran ; Wang, Jun ; Su, Yi ; Peng, Xianjia ; Liu, Jinhui ; Luan, Zhaokun |
| 刊名 | ENVIRONMENTAL EARTH SCIENCES
 |
| 出版日期 | 2013 |
| 卷号 | 70期号:4页码:1775-1782 |
| 通讯作者 | Wang, J |
| 中文摘要 | Red mud (RM) was produced during alumina production from bauxite known as the Bayer process. Arsenic was detected in the solid phase of RM (RMsf) which was disposed in the disposal area. This study investigates the effectiveness of using Zero-valent iron (ZVI), ferrihydrite, ferrous sulfate (FeSO4), waste acid (WA) or CO2 for immobilization of arsenic in the RMsf. To test the effect of the amendments on the arsenic leachability, the RMsf samples were amended with the iron-based materials or acidifiers at various w/w (weight/weight) ratios (1-10 %) for 30 days. The leachability of arsenic in the RMsf was evaluated by a 4-step water elusion process. After 30-day treatment of the RMsf, the leachability of As decreased from an initial (12.7 %) to (7.0 %) with a w/w ratio of 5 % ZVI (0 %) with 5 % FeSO4 center dot 7H(2)O, (3.4 %) with 5 % ferryhydrite, (2.0 %) with 6 % WA and (11.8 %) with 6 % CO2. FeSO4 center dot 7H(2)O and WA showed more effectively than other amendments for immobilizing arsenic. Arsenic fractionation with a sequential extraction procedure was used to evaluate the arsenic migration potential in the RMsf. FeSO4 and WA were effective in increasing the hydrous oxide combined arsenic in the RMsf. The leachable Cl- and SO4 (2-) in the RMsf increased from 2.9 to 14.1 mg/g and 19.9-44.4 mg/g with 6 % WA and 5 % FeSO4 center dot 7H(2)O added, respectively. The estimated cost of the FeSO4 and WA treatment was 0.47 and 0.49 USD per ton, respectively. |
| 收录类别 | SCI |
| WOS记录号 | WOS:000325074400029 |
| 公开日期 | 2014-06-06 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/7413]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Li, Yiran,Wang, Jun,Su, Yi,et al. Evaluation of chemical immobilization treatments for reducing arsenic transport in red mud[J]. ENVIRONMENTAL EARTH SCIENCES,2013,70(4):1775-1782. |
| APA | Li, Yiran,Wang, Jun,Su, Yi,Peng, Xianjia,Liu, Jinhui,&Luan, Zhaokun.(2013).Evaluation of chemical immobilization treatments for reducing arsenic transport in red mud.ENVIRONMENTAL EARTH SCIENCES,70(4),1775-1782. |
| MLA | Li, Yiran,et al."Evaluation of chemical immobilization treatments for reducing arsenic transport in red mud".ENVIRONMENTAL EARTH SCIENCES 70.4(2013):1775-1782. |
入库方式： OAI收割
来源：生态环境研究中心
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